/// <summary>Evidence message for EP.</summary>
/// <param name="sum">Constant value for <c>sum</c>.</param>
/// <param name="array">Constant value for <c>array</c>.</param>
/// <returns>Logarithm of the factor's average value across the given argument distributions.</returns>
/// <remarks>
/// <para>The formula for the result is <c>log(factor(sum,array))</c>.</para>
/// </remarks>
public static double LogAverageFactor(Vector sum, IList <Vector> array)
{
if (sum == null)
{
throw new ArgumentNullException("sum");
}
if (array == null)
{
throw new ArgumentNullException("array");
}
if (array.Count == 0)
{
return((sum == Vector.Zero(sum.Count)) ? 0.0 : double.NegativeInfinity);
}
return((sum == Factor.Sum(array)) ? 0.0 : double.NegativeInfinity);
}
/// <summary>Evidence message for EP.</summary>
/// <param name="sum">Constant value for <c>sum</c>.</param>
/// <param name="array">Constant value for <c>array</c>.</param>
/// <returns>Logarithm of the factor's average value across the given argument distributions.</returns>
/// <remarks>
/// <para>The formula for the result is <c>log(factor(sum,array))</c>.</para>
/// </remarks>
public static double LogAverageFactor(double sum, IList <double> array)
{
return((sum == Factor.Sum(array)) ? 0.0 : Double.NegativeInfinity);
}